In order to be able to publish, you need to have already set at least one type of deployment, that you can find in these articles : https://support.newired.com/hc/en-us/sections/360003121640-Deploying-Newired-Overlay
The publishing process involves the following steps:
1. Access Newired Editor, and set the Journeys that you want published as "ready to publish".
in order to do so, you need to hover the play button of a Journey, and then select the cloud icon as the screenshots below:
1a. Hover the green play button.
1b. Click on the cloud icon with the arrow pointing up.
2. Go to your Newired Portal.
3. Select the Site related to the Journeys you want to publish.
3. Click on the Publishing Tab
4. Scroll down to the two green button as shown in the screenshot below: